Global Patent Index - EP 3417515 A4

EP 3417515 A4 20191023 - HIGH EFFICIENCY LASER SYSTEM FOR THIRD HARMONIC GENERATION

Title (en)

HIGH EFFICIENCY LASER SYSTEM FOR THIRD HARMONIC GENERATION

Title (de)

HOCHEFFIZIENTES LASERSYSTEM ZUR ERZEUGUNG EINER DRITTEN HARMONISCHEN

Title (fr)

SYSTÈME LASER À HAUT RENDEMENT POUR GÉNÉRATION DE TROISIÈME HARMONIQUE

Publication

EP 3417515 A4 20191023 (EN)

Application

EP 17776522 A 20170329

Priority

  • US 201662315290 P 20160330
  • US 2017024678 W 20170329

Abstract (en)

[origin: WO2017172868A1] A frequency conversion laser system is configured with a single mode (SM) laser source outputting a pulsed pump beam at a fundamental frequency and a nonlinear optical system operating to convert the fundamental frequency sequentially to a second harmonic (SH) and then third harmonic (TH). The nonlinear optical system includes an elongated SHG crystal traversed by the SM pulsed pump beam which generates the SH beam. The SHG crystal has an output surface inclined relative to a longitudinal axis of the SHG crystal at a first wedge angle different from a right angle. The nonlinear optical system further has an elongated THG crystal with an input surface which is impinged upon by a remainder of the pump and SHG beams which propagate through the THG crystal at a walk-off angle therebetween to generate a third harmonic (TH) beam, the input surface of the THG crystal being inclined to a longitudinal axis of the THG crystal at a second wedge angle. The output and input surfaces of respective SHG and THG crystals are inclined so as to minimize the walk-off angle between SH and IR pointing vectors in the THG crystal thereby improving the conversion efficiency and TH output beam's ellipticity.

IPC 8 full level

H01S 3/109 (2006.01); G02F 1/377 (2006.01)

CPC (source: EP KR US)

G02F 1/3501 (2013.01 - US); G02F 1/3507 (2021.01 - KR); G02F 1/3509 (2021.01 - KR); G02F 1/353 (2013.01 - US); G02F 1/354 (2021.01 - KR); G02F 1/3551 (2013.01 - US); G02F 1/37 (2013.01 - EP KR US); H01S 3/0092 (2013.01 - KR US); G02F 1/3503 (2021.01 - US); G02F 1/3507 (2021.01 - EP US); G02F 1/3509 (2021.01 - EP US); G02F 1/354 (2021.01 - EP US); H01S 3/0092 (2013.01 - EP); H01S 3/06754 (2013.01 - US); H01S 3/0941 (2013.01 - US); H01S 3/2308 (2013.01 - US)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2017172868 A1 20171005; CN 109196737 A 20190111; CN 109196737 B 20200710; EP 3417515 A1 20181226; EP 3417515 A4 20191023; EP 3417515 B1 20231129; JP 2019513242 A 20190523; JP 6991995 B2 20220113; KR 102344775 B1 20211228; KR 20180128946 A 20181204; US 11662644 B2 20230530; US 2020301243 A1 20200924

DOCDB simple family (application)

US 2017024678 W 20170329; CN 201780032819 A 20170329; EP 17776522 A 20170329; JP 2018551191 A 20170329; KR 20187030863 A 20170329; US 201716088503 A 20170329